CAJ | 학술논문

本文对烧结有厚度为30 mm的高孔隙率通孔铜泡沫的水平表面的池沸腾进行实验研究.并采用高速摄像仪对泡沫表面的汽泡生长形貌进行了可视化研究,研究了壁面过热度对热流密度、汽泡脱离直径、汽泡生长周期的影响关系.结果表明由于本文所研究的通孔泡沫厚度较大,限制了汽泡的脱离,使传热性能低于光表面,但是使沸腾起始点降低至3℃.
본문대소결유후도위30 mm적고공극솔통공동포말적수평표면적지비등진행실험연구.병채용고속섭상의대포말표면적기포생장형모진행료가시화연구,연구료벽면과열도대열류밀도、기포탈리직경、기포생장주기적영향관계.결과표명유우본문소연구적통공포말후도교대,한제료기포적탈리,사전열성능저우광표면,단시사비등기시점강저지3℃.
The pool boiling performance on a horizontal surface of high porosity copper foam with a thickness of 30 mm is experimentally studied.The bubble growth visualization in a nucleate boiling process is recorded by a high-speed camera.The influences of wall superheat on a wall heat flux,bubble growth cycle and bubble departure diameter are investigated.It reveals that the total nucleate pooling heat transfer coefficient is lower than that on a smooth surface since the foam thickness is too high to offer much friction force to bubble departure while wall superheat for the boiling starting point is reduced to 3℃.